Extremely wide Sigma 12-24 on Canon 5D

For a photographer of architecture is not a lens wide enough. Normally I use 17 mm lens with a focal point and that is often little wide. So I welcomed the opportunity to test the lens Sigma 12-24 4.5-5.6 DG II. I tested the lens on the Canon 5D SLR.

Lens properties

The main advantage of the lens is use on full-frame SLR. In combination with the 12 mm focal you literally open up new horizons.

Aperture of lens is 4.5 to 5.6, which is quite sufficient architectural photography. Autofocus is solved using an ultrasonic HSM focus. Focus is silent and fast, but it is not a surprise at the wide-angle lens.

focus/ focus x 1,6 crop:

12-24 / 19-38 mm

aperture:

4,5 - 5,6

focus type:

HSM

filre:

none

weight:

670g

hood:

included

Body

Entire lens is very carefully drawn, suggesting his weight. The advantage is utěsněnost against dust and moisture. After taking off the cap you see large front convex lens and a built-in fixed lens hood.

This version of Sigma 12-24 lens is not made ​​in the execution EX, as was the case with the first version. The main difference is the lens surface, which already contains suede coat. This surface is the same time just ošoupal.

lens and lens case

When zooming the lens not pertain. Zooming also works backwards compared with all Canon lenses for which I got used to it and still stranded.

To get a hard lens case. It is a bit big, but how much better case to sack Canon lenses.

Extreme focus 12mm

Shooting with such a wide lens has its charm. The already well-known places, thanks to him you will discover an entirely new shots. In this photograph you can see the difference between 12mm and 17 mm focal point.

focus 12mm vs. 17mm

Compromises with the lens

The 12 mm focal lens also brings some compromises. One of them is the convex front lens. You can thus use any filters, which bothers me about most. At the same time the lens is prone to minor damage or soiling.

Photographic tests

Guality drawings in this case hard to judge. The drawing is not exactly ideal, which is a tax for extreme focus. Comparison with another, so I have a wide lens. It can, however, expect all this wide lenses do not have a perfect drawing.

I made drawings of at least compared to the 17mm focal lens with the Canon 17-40. As for the drawings, Canon clearly wins despite its soft region.

left corner

center - 100% crop

Distortion

Well is it in terms of lens distortion. Soudkovitost to 12 mm is very good, due to this focus. I did soudkovitosti compared to 17 mm focus with Canon 17-40. Sigma in this regard clearly wins. Canon in this case considerably soudkuje, which bothers me more and more.

lens distortion

Positives / Negatives

focus 12 mm

quality body including sealing

distortion in the norm due to the focus

inability to use filters

softer drawing

convex front lens

opposite zoom

Conclusion

Sigma12-24has a fewcompromises,which have led toitsextremefocus.Photographerwith themmust learn toliveasigmacompensatehimuniqueshots.On the marketthere are not manyotherlenseswiththis outbreak.